Thunderwall

You create a spectral wall of sound on a solid surface within range. You can make the wall up to 60 feet long, 20 feet high, and 1 foot thick, or a ringed wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall is opaque and lasts for the duration.

When the wall appears, each creature within its area must make a Constitution saving throw. On a failed save, a creature takes 5d8 thunder damage, is deafened and is pushed back 10 feet. On a successful save the creature takes half as much damage.  Any creature within 300 feet can hear the wall for it's duration.

One side of the wall is considered the front, selected by you when you cast this spell.  The area within ten feet of the front of the wall is difficult terrain and each creature that ends its turn within 10 feet of the front or inside the wall takes 5d8 thunder damage. A creature takes the same damage when it enters the wall for the first time on a turn or ends its turn there. The other side of the wall deals no damage.

While the wall is active you may take a bonus action to cause the wall to resonate with your voice or an instrument.  This sound is amplified by the wall and any creature within 10 feet of the front the wall chosen by you must make a Constitution saving throw or be pushed back 10 feet and be deafened.  In addition your voice or instrument can be heard up to 600 feet away from the front of the wall.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.